dtoc: Support multiple compatible strings in a node

[oweals/u-boot.git] / doc / driver-model / of-plat.txt

diff --git a/doc/driver-model/of-plat.txt b/doc/driver-model/of-plat.txt
index 86e5e25300c318ee760b9ccdbc983eb724042ebb..3ed8c759d691d925c8c7a9be703c17bc59ca6970 100644 (file)
--- a/doc/driver-model/of-plat.txt
+++ b/doc/driver-model/of-plat.txt
@@ -156,6 +156,11 @@ This avoids the code overhead of converting the device tree data to
 platform data in the driver. The ofdata_to_platdata() method should
 therefore do nothing in such a driver.
 
+Where a node has multiple compatible strings, a #define is used to make them
+equivalent, e.g.:
+
+#define dtd_rockchip_rk3299_dw_mshc dtd_rockchip_rk3288_dw_mshc
+
 
 Converting of-platdata to a useful form
 ---------------------------------------
@@ -205,7 +210,7 @@ For example:
             /* Decode the device tree data */
             struct mmc_platdata *plat = dev_get_platdata(dev);
             const void *blob = gd->fdt_blob;
-            int node = dev->of_offset;
+            int node = dev_of_offset(dev);
 
             plat->fifo_depth = fdtdec_get_int(blob, node, "fifo-depth", 0);
     #endif